Patents Examined by D. Rebsch
  • Patent number: 4705974
    Abstract: A dynamoelectric machine has at least one end frame with a pair of opposite faces and a set of apertures intersecting with the opposite faces, respectively. A stator has a set of beams secured thereto for supporting the end frame against both axial and radial displacement with respect to the stator. The beams include a set of tabs protruding through the apertures in the end frame with the tabs each having a deformed portion engaged with the end frame within the apertures therein, thereby to retain the end frame against radial displacement with respect to the stator and another deformed portion engaged with one of the opposite faces of the end frame, thereby to retain the end frame against the axial displacement with respect to the stator, respectively.
    Type: Grant
    Filed: March 25, 1985
    Date of Patent: November 10, 1987
    Assignee: General Electric Company
    Inventor: Robert W. White
  • Patent number: 4691135
    Abstract: A rotary driving device includes a pair of stator magnetic poles having opposing end faces separated by gaps; a rotor of magnetic material rotatably supported inside the stator magnetic pole pair, having two pole surfaces between two planes parallel with the axis of rotation; and an excitation coil of the stator magnetic pole pair. The angular positions of the gaps between the end faces of the stator magnetic pole pair along the circumferential direction are changed along the axial direction, so that output and detent torques are obtained effectively and satisfactorily.
    Type: Grant
    Filed: November 19, 1985
    Date of Patent: September 1, 1987
    Assignees: Nippondenso Co., Ltd., Toyota Jidosha Kabushiki Kaisha
    Inventors: Ichita Sogabe, Syuuji Murata, Yuji Yokoya
  • Patent number: 4686397
    Abstract: A non-continuous brush and commutator segment torquer motor having a single radial air gap. The motor can be placed on the opposite side of the gimbal center line of a payload. This arrangement minimizes torquer mass, as well as providing greater clearance for the gimbal payload to travel through larger angular excursions. Hence, all payloads which are gimbal mounted, such as radar antennas, can be located closer to the gimbal center and can be driven through larger look angles.
    Type: Grant
    Filed: September 3, 1986
    Date of Patent: August 11, 1987
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Jack W. Becker
  • Patent number: 4645961
    Abstract: A dynamoelectric machine having a large magnetic gap and flexible printed circuit phase windings includes a multi-pole samarium cobalt magnet assembly consisting of radially aligned magnets and circumferentially positioned interpole magnets attached to a soft iron ring for providing radially directed magnetic poles of alternating polarity, and a printed circuit winding assembly attached to a soft back iron sleeve for providing electromagnetic poles. The printed circuit winding assembly comprises a lamination of selectively aligned and interconnected printed circuit phase windings, each having serially connected printed circuit coils of the same phase. The winding and magnet assemblies are separated by a small mechanical gap to allow their relative rotation.
    Type: Grant
    Filed: April 5, 1983
    Date of Patent: February 24, 1987
    Assignee: The Charles Stark Draper Laboratory, Inc.
    Inventor: Herbert Malsky
  • Patent number: 4634906
    Abstract: The motor structure is as follows:the rotor (1) has N magnetization axes parallel to the axis of rotation of the rotor, the adjacent poles having opposite polarities;the stator (2) forms m phases (r, s), m=N/2n, for n being an integer;every phase (r, s) comprises a pair of coplanar polar pieces (3, 4) interpositioned, the one (3) in the other one (4),the polar pieces (3, 4) comprise full poles (p.sub.1 to p.sub.4 and p.sub.6 to p.sub.8) and fractional poles (p.sub.5, p.sub.9);the phases (r, s) are displaced with respect to one another;the polar pieces (3, 4) of every phase (r, s) are magnetically connected with one another by a coiled core (7).
    Type: Grant
    Filed: March 28, 1985
    Date of Patent: January 6, 1987
    Inventor: Michel Grosjean
  • Patent number: 4628430
    Abstract: The voltage present at an input is chopped by a switch which is actuated by a pulse-width modulator controlled by the output voltage and is smoothed at least by a low-pass filter, consisting of an inductance and a capacitance, at the output. In order to reduce to a minimum the delay between the time an input voltage is applied and the time a rated value is at least approximately reached by the output voltage, the inductance is bypassed by a bypassing circuit which has a low inductance and which conducts if the output voltage is below a minimum voltage and in other cases is turned off. It contains, for example, a switch which is constructed as a switchable current source and which is actuated by a comparator comparing the output voltage with a reference voltage. In transformer-coupled embodiments, isolation between the output and the input is possible. The supply unit is suited, for example for supplying auxiliary devices of an instrument transformer from the current of the power-line to be monitored.
    Type: Grant
    Filed: February 22, 1984
    Date of Patent: December 9, 1986
    Assignee: BBC Brown, Boveri & Company, Limited
    Inventor: Georg Mastner
  • Patent number: 4622628
    Abstract: An inverter for converting DC power to AC power, an oscillation control circuit for stepwise generating a command value concerning the conversion condition of the inverter, and an operation controller which, when the command value from the oscillation control circuit changes, controls the oscillation control circuit to repetitively generate alternate new and old or present command values before and after change of the command value. Particularly, this invention provides an inverter capable of continuing smooth operation even when the control system has a limited resolution.
    Type: Grant
    Filed: June 21, 1984
    Date of Patent: November 11, 1986
    Assignee: Hitachi, Ltd.
    Inventors: Shigeru Murasaki, Motonobu Hattori, Akira Ishibashi, Kenji Nandoh
  • Patent number: 4607324
    Abstract: A rectifier circuit for receiving an A.C. electrical power signal at a pair of circuit input terminals and for providing a rectified, D.C. electrical power signal at a pair of circuit output terminals includes a primary transformer winding connected to receive the A.C. electrical power signal, a plurality of secondary transformer windings, and a semi-conductor rectifying and switching circuit which supplies a D.C. electrical power signal to a storage capacitor connected across the circuit output terminals. A control circuit sequentially actuates the semi-conductor switches such that differing combinations of the secondary transformer windings are sequentially connected across the storage capacitor during each successive half cycle of the A.C. electrical power signal. By this arrangement, the charging current supplied to the capacitor and the charging potential across the capacitor fluctuate minimally during most of each half cycle and the A.C.
    Type: Grant
    Filed: February 17, 1984
    Date of Patent: August 19, 1986
    Inventor: William P. Gibbons
  • Patent number: 4510410
    Abstract: An elastic surface wave device that has good frequency characteristics and no unwanted signals, and is highly suited for mass production, comprising a piezoelectric substrate, at least one pair of transmitting and receiving electrodes on the surface of said substrate, and elastic surface wave absorbers formed by curing a composition, the main component of which is a resin curable by ultraviolet radiation, disposed on at least part of the zone on said piezoelectric substrate that propagates unwanted elastic surface waves.
    Type: Grant
    Filed: June 24, 1983
    Date of Patent: April 9, 1985
    Assignee: Hitachi, Ltd.
    Inventors: Akitsuna Yuhara, Kazuo Nate, Tatsuro Toyama, Jun Yamada
  • Patent number: 4491753
    Abstract: A motor has an electromagnetic brake which is connected to the output shaft to brake the rotation of the output shaft, whereby the driving body can be forcibly braked with excellent stopping response.A fan for forcibly cooling the inside of the motor is enclosed in the casing, whereby temperature rises can be prevented by ventilation.A bracket for supporting the iron core of the brake coil is made of a non-magnetic material, whereby the leaked magnetic flux passing through the bearing fixed on the bracket can be prevented, and consequent damage to the bearing heated by the eddy current can be prevented.The stator can be a stator having windings used in a conventional induction motor, and the rotor is a cup type rotor having a simple structure extended in the axial direction. Accordingly, the structure is simple, and the size of the motor in the radial direction can be reduced.
    Type: Grant
    Filed: February 19, 1982
    Date of Patent: January 1, 1985
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Hiroshi Kumatani
  • Patent number: 4486683
    Abstract: Nylon 11 (.gamma.-phase) is electrically poled after it is crystallized f commercially available nylon 11 by rapidly crystallizing it from the molten state. The .gamma.-phase nylon 11 so obtained exhibits high piezoelectric properties when poled under different poling conditions at different temperatures. The electrically poled .gamma.-phase nylon 11 is used in a transducer.
    Type: Grant
    Filed: October 26, 1981
    Date of Patent: December 4, 1984
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Brian A. Newman, Kook D. Pae, Jerry I. Scheinbeim
  • Patent number: 4469453
    Abstract: A driving motor of the type employing pneumatic bearings is improved by reducing a weight moment of an upper pad by cutting away a portion thereof, to make the gaps of the bearing pads of the motor more nearly uniform.
    Type: Grant
    Filed: April 22, 1983
    Date of Patent: September 4, 1984
    Assignee: Hitachi Koki Company, Limited
    Inventors: Hiroomi Kozawa, Shinichi Nishino, Shigenobu Katagiri
  • Patent number: 4461968
    Abstract: A magnetically detented piezoelectric relay including a piezoelectric bender element having a fixed portion and a movable portion; means for providing an actuating voltage to deflect the bender element; first contact means mounted on the movable portion; second stationary contact means remote from the bender element and proximate the first contact means for selective engagement therewith in response to deflection of the bender element; and magnetic circuit means including a magnet, pole means, and magnetic means on the movable portion of the bender element for magnetically adhering the movable portion to the pole means until the deflection force of the bender element exceeds the holding force of the magnetic circuit.
    Type: Grant
    Filed: January 11, 1982
    Date of Patent: July 24, 1984
    Assignee: Piezo Electric Products, Inc.
    Inventors: Eric A. Kolm, Henry H. Kolm
  • Patent number: 4458228
    Abstract: Rotary positioning apparatus for a member movable through an angle of rotation of less than comprising a rotor including windings thereon and a stator including a permanent magnet establishing a magnetic circuit providing magnetic flux through which the rotor is movable, the rotor and stator constituting a DC motor. The stator includes a stationary hollow shaft on which the rotor is rotatably supported by bearings. The rotor includes a neck adapted for being coupled with the member to be moved. A plurality of flexible current carrying wires extend through the hollow shaft and through slots provided in the neck to the windings for energization thereof. The hollow shaft has opposite open ends at one of which the wires enter the hollow shaft and at the other of which the wires exit from the shaft and extend through the slots to the windings such that the wires undergo twisting within the confines of the shaft as the rotor rotates with respect to the stator.
    Type: Grant
    Filed: November 3, 1981
    Date of Patent: July 3, 1984
    Assignee: Pierburg GmbH & Co. KG.
    Inventor: Hans Baumgartner
  • Patent number: 4451750
    Abstract: An electric motor construction comprises a housing with a motor rotor rotatably mounted in the housing with stator windings disposed in the housing around the rotor. The housing has a wall with an opening therein and a terminal box plug connector for the stator windings is mounted on the wall around the opening and includes an upper and a lower interengageable connector parts. A sealing gasket disposed between the parts which may be plug interconnected and held into position by a snap action lock. The stator windings have lead wires leading from the housing into the connector part and a continuous sealing compound resistant to humidity, vapors and gamma radiation embeds the stator windings and the lead wires and extends from the housing into the connector parts.
    Type: Grant
    Filed: January 29, 1982
    Date of Patent: May 29, 1984
    Assignee: Elektro-Mechanik GmbH
    Inventors: Dieter Heuer, Georg Schmiedke
  • Patent number: 4449622
    Abstract: An electromagnetic clutch is disposed between a drive source and a driven device for connecting and disconnecting the drive source to and from the driven device, respectively. The electromagnetic clutch includes a body rotatable by the rotative power from the drive source and an armature faced to, but normally spaced from the rotatable body. An exciting solenoid when energized moves the armature into an engaging position where the armature is attracted and urges against an end face of the rotatable body. A bearing is disposed between a fixed member of the driven device and the inner peripheral surface of the rotatable body for rotatably supporting the rotatable body on the fixed member. A cylindrical cover member is fixedly mounted, independently of the bearing, on a portion of the inner peripheral surface of the rotatable body between an axial end face thereof and the bearing.
    Type: Grant
    Filed: May 20, 1982
    Date of Patent: May 22, 1984
    Assignee: Nippondenso Co., Ltd.
    Inventors: Reijiro Okano, Kiyoshi Usami
  • Patent number: 4427909
    Abstract: A placing stand for use with a microfilm copying device or the like is driven by means of a step motor connected to the stand by wires or the like. A flywheel is coupled to the shaft of the step motor via a one way clutch so as to damp vibrations of the step motor, while allowing the stand to be quickly returned; the flywheel is not a load on the motor in the return direction.
    Type: Grant
    Filed: March 23, 1982
    Date of Patent: January 24, 1984
    Assignee: Fuji Xerox Co., Ltd.
    Inventor: Toshikatsu Takahashi
  • Patent number: 4412147
    Abstract: An ultrasonic image device such as may be used in a holography system or scanning system and having a piezoelectric transducer in which the conversion efficiency and phase are substantially constant over a wide frequency range. A piezoelectric sheet 5 .mu.m to 1000 .mu.m thick is used for a piezoelectric element. The piezoelectric sheet is constructed of a macromolecular material including polymers and copolymers of polar monomers. A high frequency signal input device applies to the electrodes coupled to the piezoelectric sheet high frequency signals of different frequencies in a range around a fundamental resonance of the piezoelectric sheet of .+-.10 to .+-.70% of the fundamental resonance frequency.
    Type: Grant
    Filed: November 4, 1980
    Date of Patent: October 25, 1983
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Masato Nagura, Kazushige Kikuchi, Hiroshi Obara, Yasushi Endo
  • Patent number: 4404485
    Abstract: A direct current motor comprising a field magnet provided with 2n magnetic poles which are magnetized with the same angular intervals as those of the magnetic poles N and S, where n is an integer of 1 or more; a magnetic member for closing the magnetic circuit of the magnetic poles of the field magnet; a plurality of armature coils in such a manner that the angular intervals of the electrically conductive portions thereof, contributing to the generation of torque in the armature coils, are substantially equal to the magnetic pole width of the field magnet; electric power supply control device to which the terminals of the armature coils are connected; short-circuit members for short-circuiting the winding initiation terminals of predetermined armature coils and the winding end terminals of other predetermined armature coils through the electric power supply control device; an armature comprising armature coils in the first series and armature coils in the second series through which the short-circuit members
    Type: Grant
    Filed: June 15, 1981
    Date of Patent: September 13, 1983
    Inventors: Itsuki Ban, Manabu Shiraki, Kazuhito Egami
  • Patent number: 4400639
    Abstract: A rotor core of an electric rotary machine is provided with a number of slots opening toward the outer peripheral surface of the core and teeth formed between the slots. At the sides of the rotor core are mounted spidery end plates having notches opposing the slots and projections opposing the teeth. That end surface of the projection which is remote from the rotor core is formed to extend farther from the end surface of the rotor core as it becomes distant from the axis of the rotor core. The rotor winding is wound about the rotor core and spidery end plates to be buried in the slots and notches, the bottom of the notch being higher than the laminate slot, so that the slot liner is not distorted during winding operations.
    Type: Grant
    Filed: November 26, 1980
    Date of Patent: August 23, 1983
    Assignee: Hitachi, Ltd.
    Inventors: Junichi Kobayashi, Takao Mifune, Shoji Tanabe